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Get the index of the object inside an array, matching a condition
...lorer, there's a polyfill on the linked page.
Performance note
Function calls are expensive, therefore with really big arrays a simple loop will perform much better than findIndex:
let test = [];
for (let i = 0; i < 1e6; i++)
test.push({prop: i});
let search = test.length - 1;...
Scala list concatenation, ::: vs ++
...matic Scala 2.10 has :+ and +: object extractors.
– 0__
Jan 18 '13 at 9:25
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show 6 more comments
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How do I invert BooleanToVisibilityConverter?
...sources>
<Converters:InvertableBooleanToVisibilityConverter x:Key="_Converter"/>
</UserControl.Resources>
<Button Visibility="{Binding IsRunning, Converter={StaticResource _Converter}, ConverterParameter=Inverted}">Start</Button>
...
Convert unix time to readable date in pandas dataframe
...12.15
3 1349979305 12.19
4 1350065705 12.15
In [25]: df['date'] = pd.to_datetime(df['date'],unit='s')
In [26]: df.head()
Out[26]:
date price
0 2012-10-08 18:15:05 12.08
1 2012-10-09 18:15:05 12.35
2 2012-10-10 18:15:05 12.15
3 2012-10-11 18:15:05 12.19
4 2012-10-12 18:15:...
Remove by _id in MongoDB console
...
Very close. This will work:
db.test_users.deleteOne( {"_id": ObjectId("4d512b45cc9374271b02ec4f")});
i.e. you don't need a new for the ObjectId.
Also, note that in some drivers/tools, remove() is now deprecated and deleteOne or deleteMany should be used ins...
GoogleTest: How to skip a test?
...o). I then removed my comment, figuring it's obsolete... but that's some really good info! +1
– Kiril
Aug 26 '11 at 17:05
...
How to scroll to the bottom of a UITableView on the iPhone before the view appears
...@ChamiraFernando this is the easiest way :)
– AITAALI_ABDERRAHMANE
Dec 15 '17 at 22:15
Note that it might make sense t...
Fast way of counting non-zero bits in positive integer
...nt() took about 1/20th of the time of bin(n).count("1"). So if you can install gmpy, use that.
To answer a question in the comments, for bytes I'd use a lookup table. You can generate it at runtime:
counts = bytes(bin(x).count("1") for x in range(256)) # py2: use bytearray
Or just define it lit...
Auto reloading python Flask app upon code changes
...nt recommended way is with the flask command line utility.
https://flask.palletsprojects.com/en/1.1.x/quickstart/#debug-mode
Example:
$ export FLASK_APP=main.py
$ export FLASK_ENV=development
$ flask run
or in one command:
$ FLASK_APP=main.py FLASK_ENV=development flask run
If you want diff...
Failed to load JavaHL Library
...tput from the last command could look like this, for example:
/usr/lib/x86_64-linux-gnu/jni/libsvnjavahl-1.so
This gives you the path, so you can add the following to your eclipse.ini:
-Djava.library.path=/usr/lib/x86_64-linux-gnu/jni/
...